Telegraphic recorder



May 17, 1932. E. 'KNOPP ET AL 1,353,510

TELEGRAPHIC RECORDER Filed Mardh 25, 1931 4 Sheets-Sheet l POWER 53 lSIG - 9? M flbtommy May 17, 1932. E. KNOPP ET AL 1,858,510

' TELEGRAPHIC RECORDER Filed March 25, 1931 4 Sheets-Sheet 2 divabtowaf, I W W May 17, 1932. E. KNOPP ET AL TELEGRAPHIC RECORDER FiledMarch 25, 1931 4 Sheets-Sheet 3 amp/kw May 17, 1932. E. KNOPP ET AL1,858,510

TELEGRAPHIC RECORDER Filed March '25, 1931 4 Sheets-Sheet 4 w $513 UM!abhor/mugs h Patented May 17, 1932 UNITED STATES 'PATET @FFEQF.

ERNEST KNOIP, OF BRONX, AND FRANK VKUNG, OF NEW ROCHELLE, NEW YORK, AS-

SIGNORS TO H. 0. ,BOEHME, ING., OF NEW YORK, N. Y., A CQIR-PQRATION OFNEW Serial No. 525,142.

YORK

TELEGRAPHIC RECORDER Application .filed March 25, 1931.

This invention relates to telegraphic recorders, and has for its objectsto increase the speed, precision, and reliability of recording, and atthe same time to improve 5! the characteristics of such instruments withrespect to durability, simplicity, mainte nance, and ease of assemblingand disassembling.

With these objects in view, the invention resides in (1) means forsupplying recording ink to the recording point of gravity as fast as thepen or stylus can apply it to amoving record tape; (2) an improved meansfor oscillating the pen or stylus in response to electromagneticfluctuations induced by telegraphic signals; the coordination of theink-feeding means with the pen and its oscillating means; and (4:)several adjusting .devices and features of construction, hereinafterpointed out.

In the accompanying drawings of an i-l lustrative embodiment of theinven'ti-on Figure 1 is a plan view in which a glass cover plate ispartly broken away;

Figure 2 is a front'elevation with several parts broken away;

Figure 3 is a side elevation, partly in section, of the upper part ofFigure 2 and at right angles thereto;

Figure 4 is an enlarged vertical seetionof a detail on line l.i ofFigure 3;

Figure 5 is a horizontal section on line 55 of Figure 4.;

Figure 6 is ail-enlarged view of the pen or stylus and associated partsin horizontal section;

Figure 7 is a broken vertical section of the parts shown in Figure 6;

Figure 8 is an enlarged vertical section of another detail;

Figure .9 is an enlarged detail in transverse section of-a valve andassociated parts;

Figure 10 is a vertical section. of a portion of Figure 7 on a largerscale; and

Figure 11 is aside elevation, broken away, of a modified detail.

Referring in detail to the drawings, 1 is a cylindrical housing withbottom plate secured by screws 3, 3 and cover 4r secur d by screws 5, 5.A box 6 having a glass top 7 is secured to cover i by hinges 8, 8, andacts as a dust cover for certain of the operating parts.

The record tape 9 (shown in elevation in Figure 2') bears a fragment ofinscription at 10. The tape is fed, to the left, by any suitable means(not shown), and enters the recorder obliquely in contact with verticalguide pin 11, then passing between brushes 1'2, 1'2 and edge-guides 13,13 to channeled guide strip or platen 1 1. The channel ends at 15,beyond which point the tape passes between a fixed lower guide 16 and apivoted guide 17, which latter may be lifted to facilitate handling thetape. Platen 14; carries a boss 18 by means of which the platen ispivotally mounted upon a vertical stem. The vertical stem is tapped ordriven into cover 4, as shown at 19 in Figure 2, and at its up per endhas a threaded socket to receive retaining screw 20. Adjacent the otherend of the platen a bracket .21, secured to cover 1,has atits upper enda split sleeve 22 which has threaded engagement with adjusting screw 23,provided with knurled head 24. The inner rounded end 25 of screw 23 isr0- tatably seated in a recess 26 on platen 14:, and a wire keeper 27(Figures 1 and 8) engages an annular groove 28 on screw 23. Keeper 27 isclamped to platen 1.4 by a screw 29 washer .30. By turning head 2%,platen 14 will be swung horizontally, turning on the axis of boss 18,and in this manner the position of the tape carried by the platen may beaccurately adjusted with respect to the recording pen or stylus,hereinafter referred to. Adjacent the recording point, tape 9 is pressedagainst the platen by a spring 31 secured at its inner end to a splitpin 32. Pin 32 is rotatably carried by a bracket 33, fastened to platen1%, and a set screw 34: engages the pinto lock it in position after thepin has been rotated to fie): spring 31 to give the desired pressure onthe tape.

The recording pen or stylus 35 is a tube having its outer end 36 bent atright angles towards the record tape, and its tapered extremi yterminates immediately adjacent the record tape in a position to applyink thereto. Preferably, the tip of the pen is a replaceable insertlightly soldered to the main tube of the pen. At its inner end pen 35 istapped into a hollow shaft 37, which is journaled in bearings 38", 38carried by slotted projections 38, 38 of a bracket 39. By meanshereinafter described the pen 35 may be rocked with the shaft 37 tocause vertical oscillation of the outer end of the pen through a smallvertical distance to produce a characteristic inscription upon themoving record tape in the manner known to the art. The verticalmovements of the pen are limited by pins 40 and 41. These pins areindependently adjustable to provide for varying the elevation of eitheror the interval between them. Referring to Figures 4 and 5, it will beseen that pin 40 projects from a disk 42, and pin 41 from a disk 43,disk 43 lies beneath disk 42 and the latter is provided with an arcuateslot 44 in which pin 41 travels when the disks are rotated relatively toone another. The disks, superimposed as shown, are rotatably held by ashouldered stud 45 in a recessed block 46 which is secured to cover 4 bymeans of flange 47. Each of the disks has gear teeth upon its periphery,which are engaged respectively by worm shafts 48 and 49, rotatablyseated in bores 50, 51 in block 46. These bores are tangential to thecircular recess containing the disks and merge therewith, permitting theworms to engage the gear teeth on the peripheries of the disk. The lowerends of the worm shafts are connected by a tension spring 52, which isseated in an oblique bore 53. Looking pins 54 are driven through theblock to engage annular grooves 55 on the worm shafts, but leaving thelatter free to rotate. It will be seen that by rotating either or bothof the worm shafts in either direction, the elevation of either or bothpins and the interval between them maybe adjusted so as to center therecorded inscription upon the tape and regulate the transverse width ofthe inscription.

The means for oscillating the pen will now be described. Rocking lever56, preferably integral with shaft 37, has a forwardly projecting arm 57lying alongside of and soldered or otherwise rigidly affixed to pen 35.The rearward end of lever 56 has a slot 56 communicating with a circularhole 56 (Figure 10). A flat pin 58, having rounded lateral edges, isfixed between the arms of a yoke 59 on the upper end of bar 60. The pin58 is of a thickness which permits it to pass freely through slot 56when lever 56 and bar 60 are put into alignment, as hereinafterdescribed; and the width of pin 58 is slightly less than the diameter ofhole 56', to permit close but free pivotal movement between the lever 56and bar 60. The end portions of pin 58, which are seated in the arms ofyoke 59, are enlarged to a width greater than the diameter of hole 56*,so that when the parts ar assembled, the pin will be locked by lever 56against longitudinal displacement in either direction.

Flange 61 on bar 60 carries a cup-shaped coil core 61, upon whosedepending skirt 63 a coil 64 is wound in two sections. Skirt 63 looselysurrounds the upper end of a core 65 of an electromagnet, the fieldcoils of which, numbered 66, 67, are shown in Figure 2. The lower end ofbar 60 projects into a central bore 68 in core 65, and ends in a yoke 69having a flat pin 69 (like pin 58) which pivotally engages link 70 inthe same manner that lever 56 engages pin 58. Link 70 is disposed inradial slot 71 and has an eye at its outer end which tightly engagesshaft 72 journaled in lugs 73 (Figure 7) and 74 (Figure 2), which dependfrom bracket 39, previously mentioned. It will be seen that when screws38* are loosened, bearings 38 may be removed from jaws 38 by shiftingthe bearings outwardly in the axial direction; shaft 37 may then beshifted to the right (Figure 6) and, when the shaft is free of the jaws,pen 35 may be swung upwardly into alignment with bar 60, in whichposition the pen 35, shaft 37 and lever 56 may be separated from bar 60.The latter may then be swung downwardly into alignment with link 70 andseparated therefrom. All other parts of the instrument may be as readilydisassembled (or assembled) as will be apparent from the description andillustration of their respective constructions and mountings.

It will be understood that, the field coils of the electromagnet beingenergized and a signal current being imposed upon coil 64. coil core 61will be displaced axially. This movement, in the embodiment shown inFigures 1 and 2, is assumed to be downward and it will be transmittedthrough bar 60 and rocking lever 56 to pen 35, throwing its recordingpoint into its upper or marking position. The movement is opposed by aspring 75 which carries at its outer end a pin 76 bearing against theunder side of lever 56. Spring 75 projects from a pivoted carrier 77mounted upon a pin 78 journaled in a bracket 79. Spring carrier 77 has arearwardly projecting extension 80 against which bears an adjustingscrew 81 by means of which the pressure of spring 75 may be varied. V

For the operation just described. unidirectional intermittent signalimpulses have been assumed. The device may be operated. however. withtwo-way or reversed signal currents. in which case the spring 75 wouldbe removed or simply released by retracting screw 81. An alternativearrangement is shown in Figure 11. for use with reversed currents. thestylus moving alternately up or down from a central base line. In thismodification there are two springs 75* and 75 respectively carrying pins76 and 76", one above the other below the stylus. The

springs project from a carrier 77 a provided with individual adjustingscrews 7 7 and 77 for varying the tension of either spring at will.Adjusting screw 81 in this instance serves for positioning the springsas a pair with reference to the central position of the stylus.

The electrical connections are as follows The field coils are in circuitwith any suitable source of direct current through the plug 83, markedPower in Figure 1, corresponding socket 84 secured to the under side ofcover 4 by screws 85, conductors 86, 87, which pass under an archedprotective strip 88 and thence through a hole in cylinder 1 to theterminals (not shown) of coils 66 and 67. Coil 64 is in circuit with asource of intermittent or fluctuating signal impulses through plug 89and its corresponding socket 90 secured to the under side of cover 4 byscrews 91, thence through conductors 92, 93 to an insulated connectorblock 94, thence through conductors 95, 96 to connector strips 97, 98and thence to the terminals of coil 64. Additional connector strips 99,100 are shown and may be employed when it is desired to employ the twosections of coil 64 as separate coils. As shown, however, the twosections of coil 64 are assumed to be connected in series and in circuitwith either a unidirectional current or a reversing current.

The ink-feeding system will now be described. The ink is fed by gravitythroughout, beginning at an elevated reservoir 101 provided with aremovable cover 102 having handle 103. The reservoir is supported upon astem 104 which is loosely clamped between arms 105, 106 of a bracket 107secured to cover 4 by screws 108. Stem 104 carries a rack 109(preferably integral) which meshes with a pinion 110 on shaft 111. Theshaft is journaled in arms 105, 106 and has at one end a knurled head112. By turning the knurled head 112 the reservoir 101 may be raised orlowered to increase or decrease the head of ink in the system and thusvary the rate of flow to the record tape. The reservoir is divided by apartition 113 into a larger ink compartment 114 and a smallercompartment 115 which may contain a cleansing fluid such as alcohol.Each compartment has its own dis charge port 116, 117, respectively,communicating with a three-way valve (Figure 9) designated generally bythe numeral 118. By means of this valve the flow of ink may be shut offor turned on, or a cleansing fluid may be released from compartment 115to flush the ink conduits, hereinafter mentioned. A nipple 119, screwedinto valve 118, provides for the attachment of a conduit 120, preferablya piece of rubber hose. As shown, hose at its other end slips over thelarger portion of a connecting sleeve, which has two diameters and isclearly indicated in Figure 1, although not directly shown. A bracket121, secured to cover 4 by screws 122, an chors hose 120 and theconnecting sleeve to cover 4. A smaller hose 123 is slipped over thereduced portion of the connecting sleeve at one end and at its other endis slipped over an axial extension 37 of hollow shaft 37, being securelyclamped thereon by means of an interiorly tapered ring 37. As previouslydescribed, hollow shaft 37 communicates with the interior of pen 35,thus completing a passage for ink (or cleansing fluid) from thereservoir to the tip of the pen. The supply of ink to the oscillatingpen through its axis provides for the least possible relative movementbetween the stationary source of ink and the moving pen, and this smallmovement is effectively and simply taken care of by torsional flexing ofhose 123. Be neath the recording point is a trough 124 which projectsfrom the lip of a drip-cup 125, secured to the side of cylinder 1 by aspring clip 126.

The operation of the recorder has been described during the foregoingdescription of the structure.

1. In a device of the character described, a pen projecting from ahollow rock shaft, said shaft being axially open at one end, atorsionally flexible conduit fixedly joined to said shaft at its openend, means for supplying marking fluid through said conduit and shaft tothe pen, and means for oscillc ting the pen and shaft.

In a device of the character described, an electromagnet having a core,said core having a radial longitudinal slot open laterally and at theouter end of the core, a stylus pivotally mounted upon a transverseaxis, a frame in coaxial telescoping relation with said core, asignalling circuit comprising an armature coil carried by said frame incoaxial telescoping relation with said core, a stem projecting outwardlyfrom said frame and pivotally connected to said stylus, a stemprojecting inwardly from said frame and into said radial slot, and alink pivotally connected at one end to said last mentioned stem withinthe slot and pivotally connected at the other end to a fixed support.

ERNEST KNOPP. FRANK KUNC.

